JAVA + vue 实现各种类型文件上传和下载(直接拷贝就能使用)

所有类型文件都能进行上传和下载 !!!
txt、doc、docx、png、jpg、jpeg、json、svg、ppt、pptx、xls、xlsx、xml…等等都可以使用

一、文件上传

1.java代码

1.1 实体类

1.2 Controller 类

	@RequestMapping("/upload")
    @ResponseBody
    public AjaxResult handleFileUpload(@RequestParam("file") MultipartFile file) {

        if (file.isEmpty()) {
            return AjaxResult.error("文件为空");
        }
        // 获取文件名
        String fileName = file.getOriginalFilename();
        String name = fileName.substring(0, fileName.lastIndexOf("."));
        System.out.println("上传的文件名为：" + fileName);
        // 获取文件的后缀名
        String suffixName = fileName.substring(fileName.lastIndexOf(".")+1);
        System.out.println("上传的后缀名为：" + suffixName);
        // 文件上传后的路径
        String filePath = "D:/configuration/";
        File dest = new File(filePath + fileName);
        // 检测是否存在目录
        if (!dest.getParentFile().exists()) {
            dest.getParentFile().mkdirs();
        }
        try {
            file.transferTo(dest);
            FileManagement fileManagement = new FileManagement();
            //文件路径 D:\测试.txt
            fileManagement.setFilePath(filePath + fileName);
            //文件名称 测试
            fileManagement.setFileName(name);
            //文件后缀 txt
            fileManagement.setSuffixName(suffixName);
            return AjaxResult.success(fileManagement);
        } catch (IllegalStateException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
        return  AjaxResult.error("上传失败");
    }
    

2. vue代码

2.1 index.vue 上传附件模块

	<el-form-item label="上传附件">
          <el-upload
            class="upload-demo"
            action=""
            :http-request="myUploadFile"
            :before-remove="beforeRemove"
            multiple
            :limit="1"
            :file-list="fileList"
            :data="{}"
          >
            <el-button size="small" type="primary">点击上传</el-button>
          </el-upload>
        </el-form-item>
        

2.2 index.vue 上传附件点击函数 (form表单字段根据自定义进行设置)

	//文件上传
    myUploadFile(obj) {
      console.log('上传',obj)
      var file = obj.file;
      let formData = new FormData();
      formData.append("file", file);
      upload(formData).then((res) => {
        this.form.filePath = res.data.filePath;
        this.form.fileName = res.data.fileName;
        this.form.suffixName = res.data.suffixName;
      });
    },
    beforeRemove(obj) {
      this.form.filePath = null;
      this.form.fileName = null;
      this.form.suffixName = null;
    },
    

2.3 **.js 前后端响应

	//文件上传
	export function upload(data) {
	  return request({
	    url: '/module/fileManagement/upload',
	    method: 'post',
	    data: data
	  })
	}
	

3. 上传成功!后端响应给前端的结果(根据情况更改)

二、文件下载

1. java Controller层

	    @PostMapping("/downLoad")
	    public void getWjscId(@RequestBody FileManagement fileManagement, HttpServletResponse response) {
	        try {
	            //文件路径 D:/测试.txt
	            String filePath = fileManagement.getFilePath();
	            //文件名称 测试
	            String fileName = fileManagement.getFileName();
	            System.out.println("下载位置" + filePath);
	            response.setCharacterEncoding("UTF-8");
	            response.setHeader("Content-disposition", "attachment;filename=" +fileName);
	            FileUtils.writeBytes(filePath, response.getOutputStream());
	        } catch (Exception e) {
	            System.out.println("下载文件失败");
	        }
	    }
	    

2. vue代码

2.1 index.vue点击事件代码块

		  <el-button
            size="mini"
            type="text"
            icon="el-icon-download"
            @click="handleDownLoad(scope.row)"
          >下载</el-button>
 

		    handleDownLoad(row){
		      downLoad(row).then((res) => {
		        let blob = res;
		        const fileName = row.fileName+"."+row.suffixName;
		        if ("download" in document.createElement("a")) {
		          // 非IE下载
		          const elink = document.createElement("a");
		          elink.download = fileName;
		          elink.style.display = "none";
		          elink.href = URL.createObjectURL(blob);
		          document.body.appendChild(elink);
		          elink.click();
		          URL.revokeObjectURL(elink.href); // 释放URL 对象
		          document.body.removeChild(elink);
		        } else {
		          // IE10+下载
		          navigator.msSaveBlob(blob, fileName);
		        }
		      });
		    }
          

2.2 **.js //文件下载

  //文件下载
  export function downLoad(data) {
    return request({
      url: '/module/fileManagement/downLoad',
      method: 'post',
      data: data,
      responseType:'blob'
    })
  }

3. 下载成功